Manual J and Manual D Calculations

Q: Was a pressure test conducted on the building and ducts to determine their leakage rates?
A: No, but I sealed the holes with aluminum tape so I think the system is pretty good. 

Q: Before the heat pumps were installed, was a manual J & manual D conducted to properly size?
A: No. But remember this was a retrofit and we already knew that the old system had sufficient heating and cooling output to create a comfortable house. Since I was significantly reducing the heating and cooling load with the fab four, I was very confident we had enough heat and cool in the system. 
Q: My understanding if you do not size the HP system using manual J & Manual D and the building and duct leakage are not verified, then NO unit will meet loads.
A: Not true, see above.